This question was also addressed
in another thread, but no answer/solution was given. I too have found this to be an annoyance, so I thought I'd address it in the General BlackBerry Discussion forum this time in hopes of reaching more users.
On 5.0 OS, whenever I go to add/remove a recipient, a new "blank" SMS screen pops up. This isn't a big deal if you hadn't already started composing your message, but if you were mid-message and decided to add/remove a recipient, I'm finding it to be an annoyance. I'm finding myself having to close out of the "new" blank SMS screen, navigate back to the "old" SMS message I was working on, copy my half-composed message, and paste it into the "new" SMS message which contains all of my desired recipients. On my 8330 pre-5.0 OS, I could add/remove recipients to my heart's content, all in the same message screen. I realize SMS is just different on 5.0 (and IMO much improved, overall), but I'm not seeing any positives to this change.
Is this "just the way it is"?